ILLC-LIRa January 2023

illc-lira@list.uva.nl

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LIRa session: Jialiang Yan (Thursday, 2 February 14:00) (UNUSUAL TIME and ONLINE ONLY)
by LIRa Seminar 27 Jan '23

27 Jan '23

Dear all, We will resume our LIRa sessions in 2023 with our first talk next week, on Thursday, 2 February. Please note the UNUSUAL TIME of 14:00 (Amsterdam time) and that this will be an ONLINE ONLY session. Please use our recurring zoom link: https://uva-live.zoom.us/j/89230639823?pwd=YWJuSnJmTDhXcWhmd1ZkeG5zb0o5UT09 (Meeting ID: 892 3063 9823, Passcode: 421723) You can find the details of the talk below. Speaker: Jialiang Yan Date and Time: Thursday, February 2nd 2023, 14:00-15:30 (NOTE the unusual time, earlier than usual) Venue: fully online. (i.e. not hybrid, zoom only) Title: Knowing and believing an epistemic possibility Abstract. What does it mean to know or believe that something might be the case? In this talk, we address the issue focusing on the epistemic possibility expressed by English might when embedded under the propositional attitude verbs know and believe. We present some puzzles to highlight the challenges arising from such know-might and believe-might sentences. We propose a framework to solve the puzzles, in which epistemic might is defined as quantifying over the epistemic possibilities in an information state, and belief is formalized in term of a plausibility ordering. In contrast to the classical epistemic logic, the factivity of knowledge is treated as a presupposition rather than being solely dependent on the reflexivity of the accessibility relation. All analyses are implemented in a team-based modal logic BSEL, an epistemic variant of Aloni’s (2022) BSML. Hope to see you there! The LIRa team

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ILLC-LIRa January 2023